Instead of using the Group presentation style to create a grouped DataWindow object from scratch, you can take an existing tabular DataWindow object and define groups in it.
To add grouping to an existing DataWindow object:
Start with a tabular DataWindow object that retrieves all the columns you need.
Specify the grouping columns.
Sort the rows.
(Optional) Rearrange the DataWindow object.
(Optional) Add summary statistics.
(Optional) Sort the groups.
Steps 2 through 6 are described next.
